Furnace.



No. 755,045. PATENTED MAR. 22, 1904.

J. RAHSKOPF.

FURNACE.

APPLICATION FILED SEPT. 14, 1903.

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J. RAHSKOPF.

FURNACE. APPLICATION FILED SEPT. 14, 1903.

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PATENT OEEIcE'.

JOSEPH RAHSKOPF, OF LAWRENCE, KANSAS.

FURNACE.

SPECIFICATION forming part of Letters Patent No. 755,045, dated March 22, 1904. I Application filed S eptember 14,1903. Serial No- 1'73,149- (No model.)

To all whom it may concern:

Be it known that I, JOSEPH RAHsKorE, a citizen of the United States, residing at Lawrence,

in the county of Douglas and State of Kansas,

have invented a new and useful Furnace, of

this class which shall possess superior advantages in point of simplicity, durability, and general efliciency. 7

My invention relates especially to that class of furnace-grates in which each grate-section may be said to include a plurality of rocking grate-bars which are suitably connected and adapted to be simultaneously operated or shaken by means of a suitably-disposed lever.

My invention consists in certain improvements in the construction of the grate-frames, in supporting means for the same, and in improved means for hanging or supporting the rocking grate-bars in said frames.

The invention further consists in the improved construction, arrangement, and combination of parts, which will be hereinafter fully described, and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a plan view ofa furnace-bed provided with my improved grates. Fig. 2'is a longitudinal sectional view taken on the line 2 2 in Fig. 1. Fig. 3 is a perspective view showing the side pieces of one of the grate-frames with one of the rocking grate-bars mounted therein. Fig.

4 is a perspective detail view of one of the rocking grate-bars inverted. Fig. 5 is a perspective detail view of one of the grate-supporting end members. Fig. 6 is. an inverted plan view of the same. Fig. 7 is a vertical transverse sectional view taken on the line 7 '7 in Fig. 1. Fig. 8 is a perspective detail view of one of the boxings alfording bearings for the rocking grate-bars. p A

Corresponding parts in the several figures are indicated by similar numerals of reference. 1 desigates the furnace-casing, which is of suitable dimensions to receive v any desired number of the grates, having the rocking grate-bars supported therein. The furnacecasing, which has been shown conventionally,

is provided with ledges or flanges 2 2, suitably disposed above the ash-pit 3 at the front and rear ends of the latter and serving to support the frames 4, which practically constitute the grate-frames of the device. These frames are composed of side pieces 5, provided near their ends with inclined portions 6 and extending shoulders 7, which are provided on their under sides with downwardly-extending lugs 8 and upon their outer sides with enlargements or reinforcements 9. Supporting devices 10 are provided, which are in the nature of caps 11, adapted to be fitted between the shoulders or extensions of the frame-bars and provided at their ends with U-shaped flanges 12, adapted to receive the said shoulders or extensions, the upper edges of the U-shaped flanges being abutted against the enlargements 9 upon said shoulders and said U-shaped flanges being provided with slots 13, adapted to receive the downwardly-extending lugs 8 of the said shoulders. These caps are detachably associated with the ends of the frames 5, which are thereby spaced and connected in such a manner that warping will be practically prevented. The upper sides of the caps 11 are provided with perforations 14L for the passage of air. These caps or spacing and supporting devices connect the ends of each pair of side bars, which are thus to some extent protected from injury by excessive heat. It will also be readily understood that these cap membersmay be readily and quickly removed and new ones substituted at a trifling expense, thereby greatly increasing the life of the grate-frames. v The side members of the said frames are connected by suitably-spaced intermediate cross-pieces 15, which may be formed integrally therewith in the process of casting, and one side member of each of said frames is provided with a plurality of notches 16, equally spaced apart and located between the cross-bars 15. The opposite side member of each frame is provided with perforations 17, alining with the oppositely-disposed notches 16. Each framebar having the notches 16 is provided below each of said notches with a wedge-shaped extension 18.

Boxes 19 are provided, consisting of blocks of metal the vertical edges of whichhave re- IOO.

. facilitated.

cesses20, adapted to engage the sides of the notches 16, with which said boxes may thus be slidingly connected. Each of said boxes is provided near its lower end with a slot or opening 21, adapted to engage the wedgeshaped projection 18 below the notch with which said box is associated. Each of said boxes is furthermore provided with a perforation 22, alining with the perforation 17 in the side of the frame opposite to that with which said boxing is connected. The boxes 19, while preferably made of cast-iron, will be possessed of a suflicient degree of resiliency to enable the slots 21 to become associated with the wedges 18 when they are placed in operative position. The parts, moreover, will not be so tightly fitted together as to prevent the parts referred to from becoming properly associated with each other when the parts of the entire device are assembled for operation.

The rocking grate-bars 25 are composed of concavo-convex top members 23, convex on their upper sides and provided each with a plurality of perforations 25. grate-bars is provided at its front and rear edges with downwardly-depending flanges 26, and end flanges 27 are likewise integrally associated with said grate-bars. The latter are likewise provided on their under sides with longitudinally-disposed fins or braces 28, having trunnions 29, adapted to engage the bearings, as will be presently described. Each of the fins or braces 28 is, moreover, provided with a downwardly extending arm 30, having a transverse perforation 31 near its lower end. In order to connect the rocking grate-bars with the frame, the trunnion at one end of each grate-bar is inserted into one of the perforations 17, and the other trunnion is placed in engagement with the perforation 22 of one of the blocks or boxings 19. y The latter is then associated with the notch 16 by driving it downwardly with the grooves 20, engaging the edges of the notch 16. A few blows of a hammer upon the upper side of the boxing may be found necessary to drive it home or until the slot 21 engages the wedge 18, where-' by the box, and consequently the rocking grate-bar, will be'secured properly in position. After all of the grate-bars belonging to the frame have been mounted therein the downwardly-extending arms 30 are connected operating-lever 34, fulcrumed upon a bracket at the front end of the furnace-casing, which lever may be socketed at its upper end, as shown at 35, to receive an extension-handle, wherebythe leverage may be increased and the work of shaking the rocking grate-bars From the foregoing description, taken in connection with the accompanying drawings,

Each of said the operation and advantages of my invention will be readily understood.

It is obvious that any desired number of the grate-frames having the rocking gratebars may be used and that each such grateframe may be provided with anydesired number of the rocking grate-bars. An operatinglever will be provided for each set of gratebars or for the grate-bars in each frame.

By the construction herein shown and described it will be seen that the rocking gratebars are not only capable of being placed closely together,but also that the front and rear edges of said rocking grate-bars are disposed adjacent to an intermediate cross-bar of the frame or to the caps constituting the ends of the frame, according to their respective locations. The parts may thus be'closely fitted together, and while the ashes will sift through there will be no unnecessary waste even if fine coal or culm is burned.

The construction of my improved furnacegrate is simple and inexpensive, and it will be obvious that in the event of any part of the device, such as one of the rocking grate-bars or one of the end supporting-caps, burning out it may be readily removed and replaced at a comparatively trifling expense.

I have herein described a simple and preferred form of my invention; but I desire it to be understood that I reserve the right to any changes, alterations, and modifications whichmay be resorted to within the scope of my invention and without departing from the spirit or sacrificing the utility of the same.

Having thus described my invention, I claim 1. In a furnace, a frame comprising side members provided at the ends thereof with extended shoulders having downwardly-extending lugs,in combination with end spacing members each consisting of a cap fitted between said shoulders and provided at its ends with U-shaped flanges engaging said shoulders and having slots engaging the lugs thereof.

2. In a furnace, a grate-frame, comprising side barsprovided with extended shoulders having downwardly-extending lugs and enlargements or reinforcements at their upper edges, in combination with end pieces consisting of caps interposed between said shoulders and provided with U-shaped flanges engaging said shoulders and bearing against the enlargements thereof, said flanges being provided with slots engaging the downwardly-extending lugs of said shoulders.

3. In a furnace, a furnace-casinghaving supporting-flanges and a grate-frame supported upon said flanges, said frame being composed of suitably-spaced side pieces having extended shoulders, and end pieces, the latter consisting of caps having Ushaped flanges in which .the extended shoulders of the side pieces are supported, said-caps being mounted upon *the supporting-flanges of the furnace-casing.

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4. Inafurnace, a grate-frame provided with In testimony that l claim the foregoing as notches in one side thereof and withswedgemy own I have hereto afiixed my signature in shaped projections below said notches, in com the presence of two witnesses.

bination with boxings having grooved sides JOSEPH RAHSKOPF. 5 engaging the edges of said notches, said boxes Witnesses:

being provided with slots to engage the Wedge- R. M. MORRISON,

shaped projections of the frame. G. F. SOXMAN. 

